Phosphine-based porous aromatic frameworks for gold nanoparticle immobilization with superior catalytic activities

2019 ◽  
Vol 7 (16) ◽  
pp. 10004-10009 ◽  
Author(s):  
Yuting Yang ◽  
Tienan Wang ◽  
Xiaofei Jing ◽  
Guangshan Zhu
Keyword(s):  
Gold Nanoparticle ◽  
Catalytic Activities ◽  
Porous Aromatic Frameworks

Phosphine-based porous aromatic frameworks (PAFs) with immobilized AuNPs exhibited superior catalytic activities and excellent recyclability towards the reduction of 4-nitrophenol.

Unveiling the Intrinsic Catalytic Activities of Single‐Gold‐Nanoparticle‐Based Enzyme Mimetics

2019 ◽  
Vol 58 (19) ◽  
pp. 6327-6332 ◽  
Author(s):  
Mahmoud Elsayed Hafez ◽  
Hui Ma ◽  
Wei Ma ◽  
Yi‐Tao Long
Keyword(s):  
Gold Nanoparticle ◽  
Catalytic Activities ◽  
Enzyme Mimetics

Unveiling the Intrinsic Catalytic Activities of Single‐Gold‐Nanoparticle‐Based Enzyme Mimetics

2019 ◽  
Vol 131 (19) ◽  
pp. 6393-6398 ◽  
Author(s):  
Mahmoud Elsayed Hafez ◽  
Hui Ma ◽  
Wei Ma ◽  
Yi‐Tao Long
Keyword(s):  
Gold Nanoparticle ◽  
Catalytic Activities ◽  
Enzyme Mimetics

β-Cyclodextrin polymer networks stabilized gold nanoparticle with superior catalytic activities

Nano Research ◽  
2020 ◽  
Author(s):  
Yong Zhang ◽  
Bing Hu ◽  
Xiao-Mei Cao ◽  
Liang Luo ◽  
Yu Xiong ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Polymer Networks ◽  
Catalytic Activities ◽  
Cyclodextrin Polymer

Photocatalytic activity of TiO2 synthesized by anodization and anodic spark deposition

MRS Advances ◽  
2020 ◽  
Vol 5 (61) ◽  
pp. 3141-3152
Author(s):  
Alma C. Chávez-Mejía ◽  
Génesis Villegas-Suárez ◽  
Paloma I. Zaragoza-Sánchez ◽  
Rafael Magaña-López ◽  
Julio C. Morales-Mejía ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Surface Characteristics ◽  
Amorphous Solids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Catalytic Activities ◽  
Anodic Spark Oxidation ◽  
Porous Surfaces ◽  
Scanning Electron

AbstractSeveral photocatalysts, based on titanium dioxide, were synthesized by spark anodization techniques and anodic spark oxidation. Photocatalytic activity was determined by methylene blue oxidation and the catalytic activities of the catalysts were evaluated after 70 hours of reaction. Scanning Electron Microscopy and X Ray Diffraction analysis were used to characterize the catalysts. The photocatalyst prepared with a solution of sulfuric acid and 100 V presented the best performance in terms of oxidation of the dye (62%). The electric potential during the synthesis (10 V, low potential; 100 V, high potential) affected the surface characteristics: under low potential, catalyst presented smooth and homogeneous surfaces with spots (high TiO2 concentration) of amorphous solids; under low potential, catalyst presented porous surfaces with crystalline solids homogeneously distributed.

Dielectrophoretic Assembly of Gold Nanoparticle Arrays Evaluated in Terms of Room-Temperature Resistance

2020 ◽  
Vol E103.C (2) ◽  
pp. 62-65
Author(s):  
Yoshinao MIZUGAKI ◽  
Makoto MORIBAYASHI ◽  
Tomoki YAGAI ◽  
Masataka MORIYA ◽  
Hiroshi SHIMADA ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Room Temperature ◽  
Nanoparticle Arrays ◽  
Temperature Resistance

Metal-Assisted Plasma Etching of Silicon: A Liquid-Free Alternative to MACE

2018 ◽  
Author(s):  
Julia Sun ◽  
Benjamin Almquist
Keyword(s):  
Liquid Phase ◽  
Plasma Etching ◽  
Chemical Etching ◽  
Gold Films ◽  
Metallic Films ◽  
Au Catalyst ◽  
Feed Concentration ◽  
Catalytic Activities ◽  
Metal Assisted Chemical Etching ◽  
Complex Nanostructures

For decades, fabrication of semiconductor devices has utilized well-established etching techniques to create complex nanostructures in silicon. Of these, two of the most common are reactive ion etching in the gaseous phase and metal-assisted chemical etching (MACE) in the liquid phase. Though these two methods are highly established and characterized, there is a surprising scarcity of reports exploring the ability of metallic films to catalytically enhance the etching of silicon in dry plasmas via a MACE-like mechanism. Here, we discuss a <u>m</u>etal-<u>a</u>ssisted <u>p</u>lasma <u>e</u>tch (MAPE) performed using patterned gold films to catalyze the etching of silicon in an SF<sub>6</sub>/O<sub>2</sub> mixed plasma, selectively increasing the rate of etching by over 1000%. The degree of enhancement as a function of Au catalyst configuration and relative oxygen feed concentration is characterized, along with the catalytic activities of other common MACE metals including Ag, Pt, and Cu. Finally, methods of controlling the etch process are briefly explored to demonstrate the potential for use as a liquid-free fabrication strategy.

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